We from "Republic Commando Reloaded" (www.rcreloaded.de.ki), a German RC modding Community, are working on a "Clone Troopers VS Battle Droids" Multiplayer Mod. In this Mod the Commandos will be replaced with normal Clone Troopers and the Trandoshans with B1 Battle Droids. You will be able to select between many different skins. We also experimented with Droidekas, Magna Guards, Geonosians and also with a AT-TE and it all works great ^^. So after this Mod we will made some other mods like this. We also working on a Big Mod with a campaign, but thats another Topic ^^.
Here are some screenshots:

correctomundo but u cant do that for the other character classes.that requires modded hudarms animations and they also makin nu mod weps and meshes. koollll
yeh i cant wait for the ATTE vs SPIDER DROID mod heavyweight heaven thatl be haha
but theyl need to make a big modmap for it..

Do you think you could tell me how you made the battle droid hudarms? If you can, I might work on a trando H.A.M. hudarm; although it would look like total osik And is there any way to make the clone headlamp an accessory? It'd be nice to have it in-game, maybe on the clone troopers.

"If at first you don't succeed, hire a mercenary to do the job for you. At least they'll get it done right."

If you've got a 3D mesh and its textures, you can convert it (with a 3D software, for example Softimage XSI) to an .ase file and then import it and the texture to UnrealED.
(This has nothing to do with Battlefront 2!)